Merge pull request #4533 from Sonicadvance1/align_tail_in_the_pale_moonlight

JIT: Align JITCodeTail to native alignment

Author: Sonicadvance1

CodeEmitter/CodeEmitter/Buffer.h

@@ -47,13 +47,13 @@ class Buffer {
     CurrentOffset += StringLength;
   }
 
-  void Align() {
-    // Align the buffer to instruction size
-    auto CurrentAlignment = reinterpret_cast<uint64_t>(CurrentOffset) & 0b11;
+  void Align(size_t Size = 4) {
+    // Align the buffer to provided size.
+    auto CurrentAlignment = reinterpret_cast<uint64_t>(CurrentOffset) & (Size - 1);
     if (!CurrentAlignment) {
       return;
     }
-    CurrentOffset += 4 - CurrentAlignment;
+    CurrentOffset += Size - CurrentAlignment;
   }
 
   template<typename T>

FEXCore/Source/Interface/Core/JIT/JIT.cpp

@@ -867,6 +867,7 @@ CPUBackend::CompiledCode Arm64JITCore::CompileCode(uint64_t Entry, uint64_t Size
   const uint64_t CodeOnlySize = GetCursorAddress<uint8_t*>() - CodeData.BlockBegin;
 
   // Add the JitCodeTail
+  Align(alignof(JITCodeTail));
   auto JITBlockTailLocation = GetCursorAddress<uint8_t*>();
   auto JITBlockTail = GetCursorAddress<JITCodeTail*>();
   CursorIncrement(sizeof(JITCodeTail));